It is good to have your own forum even about keeping a log of your own purchases.

Gentlemen the back-light of my AT-90DH screen is now dead, the white digits it is somewhat visible, but the blue back-light is no more, and this thing in all that time it did not worked more that 200 Hours.

Definably I am out of warranty according the calendar, and therefore I forced to do my own attempt so to troubleshoot the problem.

Im sorry for your trouble. If your lcd display is like the one in attached picture, I have a spare one to send you (free) to replace it. If it is a different type , please upload a photo to see how i can help you, as I have some experience with this kind of displays.

ATTEN AT-90DH advanced soldering station, all their secrets in one picture.

Some things are made just to be assembled once and that's it, unfortunately even this product is one of those.While there is some simplicity in the circuitry what ATTEN did totally wrong is the dimensions of the holes of regular parts as for example the capacitors.Parts removal is a pain in the ass.

Electrolytic capacitors are made by an unknown brands called as JWCO and after some research over internet I just find some comments that is just a bit better than totally cheapest ones.I did ESR measurements one 47uF 35V seemed degraded and I did replace it by a better Nichicon.

The true problem about the back-light was the hand soldered LED, which took me long time to isolate as problem because it did seemed as soldered. What really happened is that PCB holes does not match with the specific LED system that gets behind the display.So eventually ATTEN used a person to patch the problem, but the next problem is that LED leads are sort, so to travel around the PCB and be soldered as it should be, the only way to do that is to bent the leads with tremendous accuracy, which it did not happen here.

Generally speaking I am kinda disappointed about finding inside such budget capacitors, and fragile push buttons, which if you are not careful when using hot-air rework station these could melt.

Even so this adventure reminded me how crap was my older soldering station, which I had to use in this repair.My opinion today is that I will never trust ATTEN about buying the supposed more expensive with more features soldering station. By such build quality inside they definably do not respect their customers.

ATTEN AT-90DH advanced soldering station, all their secrets in one picture.

I am currently seeking replacement part CBB024441 (AT90DH), and I am making international inquiry about it.Mostly because price this vary extremely, and you can easily be cheated and pay over 50 Euro for a part with production cost of 4 USD.